Routing machine



Jan. 7, 1936. T. L. SIEBENTHALER 2,026,659

ROUTING MACHINE Filed April 23, 1934 INVENTOR, 7747/25: Z. Jzberrffialer.

ATTORNEYS.

Patented Jan. 7, 1936 UNITED STATES PATENT. OFFICE Thomas L. Siebenthaler, Kansas City, Mo.

' Application April 23, 1934, Serial No. 721,891 V 2 Claims.

This invention relates to machines used in the printing trade for the conditioning of engraved or etched printing plates and which is adapted to plane said plates to a type-high condition and to cut away certain portions of the plates that are not desirable.

One of the primary aims of this invention is to provide a machine of the aforementioned character that will be exceptionally accurate in that it has means for positively maintaining the router bit and motor driving the same in a fixed parallel plane to the plane of the bed supporting the engraving or out being treated.

Another object of this invention is to provide a routing and type-high machine wherein is embodied unique and novel mounting means for the motor which drives the router bit or plane, such mounting means including structure for vertically adjusting the motor and for moving the same about a plurality -.of pivotal points whereby quick and easy action takes place and positive secure support is afiorded.

A still further primary aim of the invention is to provide a routing machine that is unusually strong, durable and rugged; will withstand hard usage, yet will perform unusually heavy work because of the peculiar type of supporting means that is embodied in the machine.

With the foregoing broad objects in mind and minor objects which will be made apparent during the course of the specification, the machine will now be described by referring to the accompanying drawing, wherein:

Figure 1 is a top plan view of the machine embodying this invention.

Fig. 2 is a front elevation of the same with the bed and rails in section.

Fig. 3 is an enlarged, detailed, side elevation of the motor and associated'bracket entirely removed from the other parts of the'structure.

Fig. 4 is an enlarged, fragmentary, detailed, sectional view of the adjusting meansfor the motor, taken on line IV-IV of Fig. 3, and,

Fig. 5 isa similar detailed view taken on line V-V of Fig. 3, the motor being left in elevation.

In constructing a device of this character, care should be taken that the castings are carefully machined because accuracy with respect to intervengaging parts becomes necessary where micrometer adjustment is needed. This particular piece of equipment comprises a base 8 having a flat horizontal, planar surface Ill, upon which rests the printing plate l2 that is in the form of an ordinary zinc etching or half-tone. Along each of two edges of base 8 is positioned an upstanding support rail I4, the upper edge of which is tapered to reduce the bearing surface. At one corner of base 8 is a fixture i8 which carries standard l8 in the form of a shaft upon which is pivotally mounted one end of an arm 5 28 which forms one of a plurality of such arms that are pivotally interconnected as shown.

In this instance but one more arm 22 is employed and the free end of this latter arm carries a bracket 24. The means of pivotally in- 1 terconnecting bracket and arm 24 and 22 respectively is a pair of outstanding ears 26, through which passes pivot shaft 28. The lower end of bracket 24 carries bar 30 which rests upon both of rails M as shown in Figs. 1 and 2. The low- 15 er edge of this bar 38 is, therefore, in a plane parallel to the surface H] of base 8 because the upper edges of both rails M are in said plane. To use the machine for mortising, arms 28 and 22 are raised and lowered by lever 3! that is bifurcated at one end to underlie tube 33 which surrounds shaft l8 and directly engages arm 26. This lever is pivoted to bed 8 as at 35 and operation may take place by foot or hand power as desired. 5

A motor 32 is mounted upon bracket 24 by means of a holder 34 which directly engages and is afiixed to motor '32 by suitable bolts 323. Holder 34 is formed as shown in Fig. 5 and a dovetailed slot 38 is formed in bracket 24 to slidably receive holder 34. Thus motor 32 is mounted for vertical rectilinear reciprocating movement toward and from base 8. The pivotal connection at 28 is eccentric to the axis of motor 32 which allows easy manipulation and freedom when the machine is being used.

To move motor 32 and hold it in a desired position, there is provided an adjusting screw 40 which passes through an overhanging part 42 of bracket 24 and a collar 44 assists in maintaining the adjusting screw in operative relation. Screw .49 is in screwthreaded engagement with the socket 46 formed in holder 34 so that upon turning said screw 40 the holder and motor 34 and 32 respectively will be moved. A router bit or any other suitable tool 48 is carried by chuck 58 and rotated by said motor. This tool 48 is adjustable toward and from base 8 and in a line transversely to bar 30.

V In operating the machine, the ends of bar 38 are grasped and tool 48 drawn across or positioned upon cut l2 wherever desired. In so constructing this machine, arms 20 and 22 are relieved of weight and become merely support guides while all of the weight and support neces 7 ed claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent isz' 1. A'routing machine of the kind described, comprising, a base; a plurality of rails on the base having upper edges in a common plane parallel to the plane of said base; a standard at one corner of said base; a plurality of pivotally inter connected arms mounted on'saidstandard-ior movement thereabout; a bracket piyotally car ried by the outermost arm; amotorinounted for vertical rectilinear movement on the said bracket; means for moving and holding said motor in the adjusted position; a bar on the bracket slidably resting on the upper edges of said rails; and a router bit carried by the motor longitudinally movable independently of the motor transversely of the said bar toward and from the said base.

2. A machine of the character described comprising a base; a standard carried by the base; a plurality of pivotally interconnected I arms mounted on'the standard; a'motor' carried at the free end of one of said arms, salid standar'd comprising a vertical shaft and a tube surrounding said shaft, the said arms being directly connected to said tube for rotary and longitudinal move- 15 

